Siemens SIMOTION D4 5-2 Series Commissioning And Hardware Installation Manual page 91

Note
DCC SIMOTION blocks with retain behavior act like retain variables in terms of copying RAM
to ROM, resetting memory, downloading, backing up non-volatile SIMOTION data
(_savePersistentMemoryData) and backing up data.
For the SINAMICS Integrated and CX32-2, the data backup of the SINAMICS retain data
(and therefore also for SINAMICS DCC) is performed via the NVRAM (D4x5-2) or the FRAM
(CX32-2). SINAMICS data is not saved with _savePersistentMemoryData. The non-volatile
SINAMICS data (NVRAM data) is backed up by setting the CU parameter p7775 to 1.
For further information on DCC, see the
The non-volatile data of the SIMOTION D4x5-2 has the following properties:
Table 4- 2
Properties
Location
Back-up battery
Backup time
If the buffer time is exceeded on the real-time clock, the time is reset.
Fan/battery module
If the backup time for the real-time clock (RTC) is not sufficient, a battery can be connected
by means of an external fan/battery module. The backup time when a battery is used is at
least three years.
A 3 V lithium SN: 575332 battery type (with cable lug and connector) is used. The battery
can be replaced without data loss, because the real-time clock is backed up internally via the
SuperCap.
A fan/battery module is always required for SIMOTION D4x5-2 and therefore is always
supplied with the module (see the
SIMOTION D4x5-2
Commissioning and Hardware Installation Manual, 02/2012
Non-volatile data and real-time clock properties
Non-volatile data
The non-volatile data is located
For a D4x5-2 in an NVRAM
•
For a CX32-2 in an FRAM
•
No
There is no maximum backup time
SIMOTION D4x5-2
DCC Programming
Programming Manual.
Real-time clock (RTC)
The real-time clock is backed up
maintenance-free via a SuperCap or a
battery.
Optional
(for longer backup time)
SuperCap: At least 4 days
•
Battery: At least 3 years
•
Manual).
Commissioning (hardware)
4.3 User memory concept
91